Merge pull request #365 from svga/fix_issue_feature

issue 问题修复

Author: PonyCui

library/src/main/java/com/opensource/svgaplayer/SVGACache.kt

@@ -1,12 +1,18 @@
 package com.opensource.svgaplayer
 
 import android.content.Context
+import com.opensource.svgaplayer.utils.log.LogUtils
 import java.io.File
 import java.net.URL
 import java.security.MessageDigest
 
-
+/**
+ * SVGA 缓存管理
+ */
 object SVGACache {
+
+    private const val TAG = "SVGACache"
+
     enum class Type {
         DEFAULT,
         FILE
@@ -36,11 +42,39 @@ object SVGACache {
         this.type = type
     }
 
-//    fun clearCache(context: Context?){
-//        context ?: return
-//        cacheDir = "${context.cacheDir.absolutePath}/svga/"
-//        File(cacheDir).takeIf { it.exists() }?.delete()
-//    }
+    /**
+     * 清理缓存
+     */
+    fun clearCache() {
+        if (!isInitialized()) {
+            LogUtils.error(TAG, "SVGACache is not init!")
+            return
+        }
+        SVGAParser.threadPoolExecutor.execute {
+            clearDir(cacheDir)
+            LogUtils.info(TAG, "Clear svga cache done!")
+        }
+    }
+
+    // 清除目录下的所有文件
+    private fun clearDir(path: String) {
+        try {
+            val dir = File(path)
+            dir.takeIf { it.exists() }?.let { parentDir ->
+                parentDir.listFiles()?.forEach { file ->
+                    if (!file.exists()) {
+                        return@forEach
+                    }
+                    if (file.isDirectory) {
+                        clearDir(file.absolutePath)
+                    }
+                    file.delete()
+                }
+            }
+        } catch (e: Exception) {
+            LogUtils.error(TAG, "Clear svga cache path: $path fail", e)
+        }
+    }
 
     fun isInitialized(): Boolean {
         return "/" != cacheDir
@@ -49,9 +83,11 @@ object SVGACache {
     fun isDefaultCache(): Boolean = type == Type.DEFAULT
 
     fun isCached(cacheKey: String): Boolean {
-        return (if (isDefaultCache()) buildCacheDir(cacheKey) else buildSvgaFile(
-                cacheKey
-        )).exists()
+        return (if (isDefaultCache()) {
+            buildCacheDir(cacheKey)
+        } else {
+            buildSvgaFile(cacheKey)
+        }).exists()
     }
 
     fun buildCacheKey(str: String): String {